SynaptiCAD - Dynamic Design Simulation
SynaptiCAD has released version 15 of its family of Timing Diagram Editors and test bench generators. The major enhancement in the new version is the ability to create blocks of editable analog waveforms using simple Python-based equations.

Timing Diagram Editors offer Editable Analog Equations
The tool also includes a number of built-in equations to create common analog patterns such as ramps, sine waves, and capacitive charge/discharge curves. The resulting waveforms can then be exported to many simulation environments including Verilog, VHDL, and SPICE simulators.
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